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Title: Magnetic manipulation of self-assembled colloidal asters.

Self-assembled materials must actively consume energy and remain out of equilibrium to support structural complexity and functional diversity. Here we show that a magnetic colloidal suspension confined at the interface between two immiscible liquids and energized by an alternating magnetic field dynamically self-assembles into localized asters and arrays of asters, which exhibit locomotion and shape change. By controlling a small external magnetic field applied parallel to the interface, we show that asters can capture, transport, and position target microparticles. The ability to manipulate colloidal structures is crucial for the further development of self-assembled microrobots
Authors:
;  [1]
  1. (Materials Science Division)
Publication Date:
OSTI Identifier:
1025111
Report Number(s):
ANL/MSD/JA-70398
Journal ID: 1476-1122; TRN: US201120%%301
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nat. Mater.; Journal Volume: 10; Journal Issue: 9 ; Sep. 2011
Research Org:
Argonne National Laboratory (ANL)
Sponsoring Org:
SC
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; COLLOIDS; FUNCTIONALS; MAGNETIC FIELDS; MAGNETIC MATERIALS; SHAPE; TARGETS; TRANSPORT